Fluid-operated motor



J. A. KALLBECK FLUID OPERATED MOTOR Aug. 30,1927. 1,641,001

Filed April 12', 1927 Patented Aug. 30, 1927.

UNITED STATES.

PATENT OFFICE.

JOHN A. KALLBECK; OF SAN FRANCISCO, CALIFORNIA;

FLUID-OPERATED MOTOR.

Application filed Apri l 12, 1927. Serial No. 183,072.

admission of pressure to the reciprocating piston. 7

- The primary object of the invention is the provision of means in the form ofducts and channels for controlling the admission of pressure alternately to the opposite ends of a reciprocating valve, thereby dispensing with the necessity of the common valve gear for mechanically controlling the'reciprocation of the valve.

A further object is to provide a structure which is simple and durable, which when set in operation will continue to operate indefinitely without attention; one which contains but few parts and is not likely to become out of order. 7 With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in'the accompanying drawings and pointed out in the claim hereto appended; it being understood thatvarious changes in the form, pro portion, size and minor details of construction within the scope of the claim may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Referring more particularly to the drawing, forming a part of the present application I Fig. 1 is a view in top plan of the'preferred embodimentof my invention.

Fig. 2 is a vertical, longitudinal sectional view on line 22 of Fig. 1.

Fig. 3 is a transverse vertical sectional View on line 3-3 of Fig. 2.

Fig. 4 is a view in perspective of one of the reciprocating valves.

Referring to the drawings in which like characters designate like parts throughout the several views, 1 indicates a piston cylinder in which reciprocates a conventional piston 2 from which extends a rod 3, the latter operating through a stufiing box 4, in one of the end plates 5, the latter closing opposite ends of the cylinder 1. The upper surface of the piston cylinder wall 6 is relatively flat at T and on the same rests the relatively fiat base 8 of a valve casing 9, the latter being formed with a valve chamber 10, closed at its endsby members 11, and in which valve chamber is rec'iprocably mounted a cylindrical valve 12.

Communicating preferably with the longitudinal center of the valve casing 9 is a fluid inlet 13 and also'communicating with the valve casing 9' at either side of the fluid inlet 13 are fluid exhaust ports 14 and 14:, they being connected by a Y-exhaust-15 leading to a common point. The respective ends of the cylinder 1 are conected with the respective opposite ends of the valve chamber 10, through fiuidinlet and exhaust channels 16 and 16. The respective ends of the cylinder 1 are connected with the opposite ends of the valve chamber 10 through the valve oper ating by-pass conections 17 and 17, leading from'the uper cylinder wall 6, and communieating with the interior of the valve chamher 10 throu h its side wall, as clearly illustrated in Figs. 2 and 3.

Reciprocably mounted within the valve chamber 10 is a cylindrical valve 12 of a length considerably less than that of the valve chamber, as illustrated in Fig. 2, and provided with a circumferentially reduced central portion 19 aifording pistons 20 at opposite ends of the valve. The upper surface of the reduced central portion 19 is channeled at 21 affording a fluid pressure inlet, and the channel divides at its opposite end into a pair of discharge ports 22 and 22 opening through the lower surface of the pistons 20 adapted one to register with each of the inlet and exhaust channels 16 and 16' on the reciprocation of the valve in either direction within the chamber 10. A guide pin 23 extends transversely of the chamber 10 and engages the upper side edges of the opening 21 for limiting its reciprocation inwardly from oposite ends thereof and opening through the valve side all to alternatcly rceistcr with the respective tluid exhaust ports lt and 1-1 as the valve reciprocates from one end of its chamber to the other.

it will be observed that the valve, when reciprmaitcd to its tull stroke in either direction within its chamber, connects the end of one lluid inlet and exhaust channel and the end of a correspondingfluid exhaust port and allords communication from the fluid inlet ii, to the interior of the cylinder 1 through the other fluid inlet and exhaust chaiiinel. lleciprocably mounted within the end members 11 of the valve casing 9 are suitable imglependcntly movable valve starting or positioning plungers E28.

lVith the inlet 13 connected with a source of fluid supply under pressure for example, steam, and with the valve 12' in the position im'licated in For. 2 ot the dra'iwing, and the piston at the end oil its stl'uhe, as in Fig". 3 ot the drawing, the apparatus operates in the following manner The lluid under pressure enters the cylinder 1 through the inlet and exhaust chanuel ill, forcing the piston to the right in its cylinder, and immediately on the piston 2 uncovering the by-pass connection 17, the fluid pressure passes through the by-pass connection and enters the bore 2-} in the left piston of the valve 12, discharging therefrom through the port in piston surface 25,

setting up a compression between the left end oil? the alve and the correspoiuling end ill of the valve chamber. This compression causes a rapid reciprocation oi the valve to the right in the chamber 1th and the registering; ot the compression rcliet bore 527 at the right end of the alive with the fluid exhaust; 1% during the rapid movement oil the valve to the right in its chamber, relieves the compression :l'ormed in the right end of the valve chamber between the valve end and end 11 of the valve chamber. The reciprocation ot the valve 12 to the right cuts oil the conmlunication between the outlet port and the inlet and exhaust channel 16; the solid portion of the right end of the pieton cutsv all communication between the inlet and exhaust channel 16 and the fluid exhaust: l i: a lter which the end 22 ot' the chan no] it. attords a communication between the fluid inlet 1%) and the lluid inlet and exhaust channel enabling fluid, under pressure to be admitted into the cylinder 1 at the right: ot the piston 2. The valve 12 in its reciprocation to the right in its chamber 10 uncovers exhaust l t and inlet and er:- haust channel 16 and affords a registering or connection between the exhaust 14 and the inlet and exhaust channel 16, which enlll'lltlSl'llQ escape of pressure through said channel and port which may accumulate in advance of the direction ot reciprocation ot the iiiston 52, as the same travels to the lc'l't in the ifvlinder. 'llhe inliivcment ol' the valve 1 to the right in its valve chamber ll) also connects the l y- )ass channel l7 with the channel in the r' it end of the valve, but not before the lei and of valve lid has partly opened channel 16', through which the con'ipressed fluid is now in action, rcciprocating the valve 12 towards the right.

its illustrated and described, the by-pass channels 1'? and It admit the l'luid under pressure only tor a shortpcriod alternately to opposite ends oil valve .19, the expansive pressure ot the l'luid rapidly shifting the valve in its casing. This operation of the valve ma liQli it possible to use a short piston :2, which is desirable in apparatus olf this type. As the piston passes over and lies to the lelt of the lji vpass 17, the fluid under pressure which has caused the movement of the piston to the left, is instantly admitted into the by-pass 1"? and acts on the right end of the valve to reciprocate the same rapidly to the le'llt in the valve chamher it) thus the valve operation takes place autonnitically to alternately admit pressure to opposite sides ol. the piston 2.

blhould the piston 2 and valve 12 rest at a point otli'sct from their relatively operating;

positions, the operator in starting the apparatus may by actuating the members 28, position the valve 12 in. its chamber 10 in its relative operating; position with relation to the piston 2.

I claim A 'lluid motor cmnprising a cylinder, :1 piston reciprocablc thcreii'n a valve chamber provitjled with a lluid inlet port and. a pair o'l tluid exhaust ports, one at either side oi the inlet port said valve casing, being 'l'urther provided with tluid inlet and exhaust channels connecting the cylinder near its opposite ends with the valve chamber adjacent corriv pomliup ends, a pair oil "alve operating hy-pass channels one connecting one end of the cylinder with the opposite end of the valve ehai'i'ibcr, said charmels opening into the cylinder between the fluid inlet and exhaust ports and opening into the valve chamber one between the 'l'luid inlet: port and each oil said exhaust ports, a valve reciprocable within the valve chamber and provided with a channel having a single centrally disposed inlet: port and a pair of discharge ports the tormer communicating with the lluid inlet port and the latter adapted for alternate registering with the respective valve chamber inlet and exhaust channels, said valve at; opposite ends being further provided with longitudinal. bores, each opening at one end at the valve end and at their opposite end through the valve side wall for registering with one of said valve operating lay-pass channels on the reciprocation of the valve in either direction, said valve being further provided with com pression relief bores extending longitudinally inwardly from opposite ends thereof and opening through the valve side wall to alternately register with the respective fluid exhaust ports, said valve being of a length when reciprocating its full stroke in either direction within its chamber to aflord a fluid pressure inlet to one side of the piston 10 and a pressure exhaust from the other side.

In testimony whereof I have signed my I name to this specification.

JOHN A. KALLBEOK. 

